Synthesis of a tritium labelled analog of the novel hematoregulatory agent SB 209978
作者:Dirk Heerding、David Saunders
DOI:10.1002/(sici)1099-1344(199706)39:6<455::aid-jlcr997>3.0.co;2-4
日期:1997.6
[H-3]-SB 209978 (10) was synthesized in 6 steps from phenylene diamine dihydrochloride. A key aspect was the regioselective synthesis of 6-chloropicolinic acid (7). This was condensed with diamine 6 and the resulting product was deprotected to give 9. Palladium catalyzed H-3-hydrogenolysis of the chloropyridine rings gave the final product 10.